can anyone suggest a good PHP function, script, or method to Prevent user from Sending Duplicate messages?
Here's the scenario. I own a community website. Members can send each other messages. Then some spammers from Africa contacted all members by sending copy paste messages. How can I prevent this?
I've seen some website implements similar functionality. When a user send 3 messages and the website detected that those 3 messages are duplicates/similar. It warns the user against spamming.
Does anyone know of a function or script in PHP that I could use? Thank you in advance.